Hey...could you go into some more detail about your reluctance to just leave?
I would also like to know more, particularly since you say you are still attached. is it a "let me go back to my country so we could possibly be long distance in the future" kind of thing?
How to "force" and hurry the things?
A simple way is to just say things straight up. And let me walk you through why I think its the best way:
First and foremost, it is what it is. A breakup is a difficult thing and if you're set on it then why beat around the bush. It seems you want to do it like this to not hurt her, or to avoid blame. Whatever the cause, there will be a lot of emotions around.
Second, breaking up will most certainly make her feel rejected (she is being rejected..), often with BPD, minor rejections can cause a split (not wanting to spend time together, hanging out with friends instead of the partner, not agreeing with them, etc) so a major rejection like this would likely be a shock to her either way.
Also Third, you will need her help in moving out, its her place (it seems) and you will need cooperation to arrange for things to be moved, things paid for (shared bills, etc), and other practicalities (pets? passports/visas/residency requirements?)
So, more info needed. Why the need for her to dump you instead of a "friendly/arranged breakup"?